Operation
1. Flush the bag at least 3 times with puri
fi
ed
air or nitrogen before use.
2. To
fi
ll the bag, connect PTFE tubing from the
exhaust port of an air sample pump to the
hose connection on the bag (stem protruding
from the top of the inlet
fi
tt
ing).
3. Ensure that the valve is locked open by tightening the
knurled thumbscrew clockwise until snug. Turn on the
sample pump to
fi
ll the bag (
see Proper Bag In
fl
ation
).
Do not sample compounds that exceed the 225 F (107.2 C)
temperature rating of the
fi
tt
ing O-rings.
When using 237 Series SamplePro FlexFilm bags, do not
sample compounds that exceed 140 F (60 C) temperature.
Do not use sample bags to sample compounds with
boiling points > 249.8 F (121 C).
4. When sampling is complete, turn o
ff
the pump and
loosen (turn counterclockwise) the knurled thumbscrew a
maximum of 2 revolutions.
5. Close the shut-o
ff
valve by pulling up on the valve stem.
(
Note:
Ensure the PTFE tubing is not pulled o
ff
while
pulling up on the valve stem.) Tighten the knurled
thumbscrew until snug to lock the valve closed.
The outside diameter of the syringe needle should not be
larger than 22 gauge (0.028 inch).
Do not allow the syringe needle to puncture the bag
material when piercing the septum.
6. To withdraw samples using a needle and syringe,
carefully insert the needle into the port in the septum
fi
tt
ing and pierce the septum.